1142543613421 has 4 divisors (see below), whose sum is σ = 1305764129632. Its totient is φ = 979323097212.

The previous prime is 1142543613413. The next prime is 1142543613427. The reversal of 1142543613421 is 1243163452411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1142543613421 - 2³ = 1142543613413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142543613427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81610258095 + ... + 81610258108.

It is an arithmetic number, because the mean of its divisors is an integer number (326441032408).

Almost surely, 2^{1142543613421} is an apocalyptic number.

It is an amenable number.

1142543613421 is a deficient number, since it is larger than the sum of its proper divisors (163220516211).

1142543613421 is an equidigital number, since it uses as much as digits as its factorization.

1142543613421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163220516210.

The product of its digits is 69120, while the sum is 37.

The spelling of 1142543613421 in words is "one trillion, one hundred forty-two billion, five hundred forty-three million, six hundred thirteen thousand, four hundred twenty-one".